Influence of boiling on the quality of oakwood during peeling processes

IRG/WP 08-10656

M Svoradová, F Charrier, R Marchal, L Bléron, B Charrier, J-C Butaud

Peeling process may be an efficient technology to transform secondary quality trees into veneer. After cutting and drying, veneer can be used for plywood or LVL production. If natural durability of these new panels is sufficient, they may be used for joinery production without preservative treatment. With the collaboration of ENSAM Cluny, Zvolen University and Pau University, we have investigated the different parameters of oak boiling and peeling process in laboratory. The goal was to preserve the best quality of oak veneer. One tree was separated in 9 different logs (1 meter length). Each of them was treated at different temperature (50, 70 or 90°C) during 12, 24 or 48 hours. Total phenols analysis has shown that important differences were observed. Total phenols content is decreasing with temperature and time of treatment until 40 %. The analysis of the best compromise between temperature of bath and preservation of phenols make us recommend the use of oak treatment at 60°C during 24 hours.


Keywords: oakwood (Quercus petraea, Quercus robur), total phenols, boiling process, industrial peeling, natural durability

Conference: 08-05-25/29, Istanbul, Turkey


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